Alright, let's work through 9978 times 8107 step by step
9978 × 8107 = 8107 × (9978)
+ 8107 × 8 producing 64856
+ 8107 × 70 that equals 567490
+ 8107 × 900 what gives us 7296300
+ 8107 × 9000 that results in 72963000

= 80891646
